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Math Help - Help with a problem

  1. #1
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    Help with a problem

    Need help on this part

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  2. #2
    MHF Contributor

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    The sine is the y coordinate of the point at which the line y= -2x and the unit circle, x^2+ y^2= 1 intersect. What is that point? (Of course, the line and circle intersect in two points. You want the one in the second quadrant.)
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